HTML Cleaner & Formatter

HTML Cleaner & Formatter

What this tool does

Clean HTML fragments by removing scripts, unsafe attributes and inline styles, with readable formatting and text-only output.

How to use

Paste an HTML fragment. Process, compare the output, and copy or download HTML. Output is shown as source text and never executed here.

Limitations

200,000 characters. Intended for HTML body fragments, not full website cleanup. Removes scripts, inline styles, forms, embeds, SVG/MathML and unsafe attributes. The browser can normalize malformed HTML. It does not validate HTML conformance or preserve all original layout. Sanitized HTML is not a guarantee for every application context; review before use.

FAQ

Are files or text uploaded?

No. Processing happens locally in your browser.

Should I review the output?

Yes. Compare it with the original using the stated limitations before use.

Does it work on mobile?

Modern browsers are supported; format support and available memory depend on your device.

`);let i=N?F(e):e;if(J===q)try{t=new u().parseFromString(i,Zt)}catch(e){}if(!t||!t.documentElement){t=rt.createDocument(J,`template`,null);try{t.documentElement.innerHTML=Ut?P:i}catch(e){}}let a=t.body||t.documentElement;return e&&r&&a.insertBefore(n.createTextNode(r),a.childNodes[0]||null),J===q?ot.call(t,U?`html`:`body`)[0]:U?t.documentElement:a},_n=function(e){let t=me?me(e):e.ownerDocument;return it.call(t||e,e,l.SHOW_ELEMENT|l.SHOW_COMMENT|l.SHOW_TEXT|l.SHOW_PROCESSING_INSTRUCTION|l.SHOW_CDATA_SECTION,null)},vn=function(e){return e=le(e,ct,` `),e=le(e,lt,` `),e=le(e,ut,` `),e},yn=function(e){var t;e.normalize();let n=me?me(e):e.ownerDocument,r=it.call(n||e,e,l.SHOW_TEXT|l.SHOW_COMMENT|l.SHOW_CDATA_SECTION|l.SHOW_PROCESSING_INSTRUCTION,null),i=r.nextNode();for(;i;)i.data=vn(i.data),i=r.nextNode();let a=(t=e.querySelectorAll)==null?void 0:t.call(e,`template`);a&&_(a,e=>{xn(e.content)&&yn(e.content)})},bn=function(e){let t=E?E(e):null;return typeof t!=`string`||Y(t)!==`form`?!1:typeof e.nodeName!=`string`||typeof e.textContent!=`string`||typeof e.removeChild!=`function`||e.attributes!==S(e)||typeof e.removeAttribute!=`function`||typeof e.removeAttributeNode!=`function`||typeof e.getAttributeNode!=`function`||typeof e.setAttribute!=`function`||typeof e.namespaceURI!=`string`||typeof e.insertBefore!=`function`||typeof e.hasChildNodes!=`function`||e.nodeType!==T(e)||e.childNodes!==y(e)},xn=function(e){if(!T||typeof e!=`object`||!e)return!1;try{return T(e)===A.documentFragment}catch(e){return!1}},Sn=function(e){if(!T||typeof e!=`object`||!e)return!1;try{return typeof T(e)==`number`}catch(e){return!1}};function Q(e,n,r){e.length!==0&&_(e,e=>{e.call(t,n,r,$t)})}let Cn=function(e,t){return!!(H&&e.hasChildNodes()&&!Sn(e.firstElementChild)&&C(Re,e.textContent)&&C(Re,e.innerHTML)||H&&e.namespaceURI===q&&He[t]&&(Sn(e.firstElementChild)||typeof e.textContent==`string`&&C(Ue[t],e.textContent))||e.nodeType===A.processingInstruction||H&&e.nodeType===A.comment&&C(ze,e.data))},wn=function(e,t){return e instanceof RegExp?C(e,t):e instanceof Function&&!!e(t,...[...arguments].slice(2))},Tn=function(e,t,n){if(!yt[t]&&An(t)&&wn(z.tagNameCheck,t))return!1;if(Pt&&!K[t]){let t=b(e),r=y(e);if(r&&t){let i=r.length;for(let a=i-1;a>=0;--a){let i=e===n?ee(r[a],!0):r[a];t.insertBefore(i,fe(e))}}}return X(e),!0},En=function(e,t,n,r){return e.length===0?t:t===n||t===r?O(t):t},$=function(e,t){return e===t||b(e)!==null?!1:(Ft&&pn(e),!0)},Dn=function(e,n){if(Q(I.beforeSanitizeElements,e,null),$(e,n))return!0;if(bn(e))return X(e),!0;let r=Y(Ye(e));if(L=En(I.uponSanitizeElement,L,_t,Et),Q(I.uponSanitizeElement,e,{tagName:r,allowedTags:L}),$(e,n))return!0;if(Cn(e,r))return X(e),!0;if(yt[r]||!(B.tagCheck instanceof Function&&B.tagCheck(r))&&!L[r]){let t=Tn(e,r,n);return t===!1&&(Q(I.afterSanitizeElements,e,null),$(e,n))?!0:t}if(j(e)===A.element&&!ln(e)||(r===`noscript`||r===`noembed`||r===`noframes`)&&C(Be,e.innerHTML))return X(e),!0;if(V&&e.nodeType===A.text){let n=vn(e.textContent);e.textContent!==n&&(ie(t.removed,{element:e.cloneNode()}),e.textContent=n)}return Q(I.afterSanitizeElements,e,null),$(e,n)},On=function(e,t,r){if(bt[t]||mn(t,e)||jt&&(t===`id`||t===`name`)&&(r in n||r in en))return!1;let i=R[t]||B.attributeCheck instanceof Function&&B.attributeCheck(t,e);return St&&C(dt,t)||xt&&C(ft,t)?!0:i?zt[t]||C(gt,le(r,mt,``))||(t===`src`||t===`xlink:href`||t===`href`)&&e!==`script`&&ue(r,`data:`)===0&&Lt[e]||Ct&&!C(pt,le(r,mt,``))?!0:!r:An(e)&&wn(z.tagNameCheck,e)&&wn(z.attributeNameCheck,t,e)||t===`is`&&z.allowCustomizedBuiltInElements&&wn(z.tagNameCheck,r)},kn=D({},[`annotation-xml`,`color-profile`,`font-face`,`font-face-format`,`font-face-name`,`font-face-src`,`font-face-uri`,`missing-glyph`]),An=function(e){return!kn[oe(e)]&&C(ht,e)},jn=function(e,t,n,r){if(N&&typeof d==`object`&&typeof d.getAttributeType==`function`&&!n)switch(d.getAttributeType(e,t)){case`TrustedHTML`:return F(r);case`TrustedScriptURL`:return et(r)}return r},Mn=function(e,t,n,r){try{return n?e.setAttributeNS(n,t,r):e.setAttribute(t,r),!bn(e)||(X(e),!1)}catch(n){return Z(t,e),!1}},Nn=function(e,n){if(Q(I.beforeSanitizeAttributes,e,null),$(e,n))return;let r=e.attributes;if(!r||bn(e))return;R=En(I.uponSanitizeAttribute,R,vt,Dt);let i={attrName:``,attrValue:``,keepAttr:!0,allowedAttributes:R,forceKeepAttr:void 0},a=r.length,o=Y(e.nodeName);for(;a--;){let n=r[a],s=n.name,c=n.namespaceURI,l=n.value,u=Y(s),d=l,f=s===`value`?d:de(d),p=!1;if(i.attrName=u,i.attrValue=f,i.keepAttr=!0,i.forceKeepAttr=void 0,Q(I.uponSanitizeAttribute,e,i),f=i.attrValue,Mt&&(u===`id`||u===`name`)&&ue(f,Nt)!==0&&(Z(s,e,n),f=Nt+f,p=!0),H&&C(/((--!?|])>)|<\/(style|script|title|xmp|textarea|noscript|iframe|noembed|noframes)/i,f)){Z(s,e,n);continue}if(u===`attributename`&&ce(f,`href`)){Z(s,e,n);continue}if(!i.forceKeepAttr){if(!i.keepAttr){Z(s,e,n);continue}if(!wt&&C(Ve,f)){Z(s,e,n);continue}if(V&&(f=vn(f)),!On(o,u,f)){Z(s,e,n);continue}f=jn(o,u,c,f),f!==d&&Mn(e,s,c,f)&&p&&re(t.removed)}}Q(I.afterSanitizeAttributes,e,null),$(e,n)},Pn=function(e){let t=null,n=_n(e);for(Q(I.beforeSanitizeShadowDOM,e,null);t=n.nextNode();)if(Q(I.uponSanitizeShadowNode,t,null),Dn(t,e),Nn(t,e),xn(t.content)&&Pn(t.content),j(t)===A.element){let e=pe(t);xn(e)&&(Fn(e),Pn(e))}Q(I.afterSanitizeShadowDOM,e,null)},Fn=function(e){let t=[{node:e,shadow:null}];for(;t.length>0;){let e=t.pop();if(e.shadow){Pn(e.shadow);continue}let n=e.node,r=j(n)===A.element,i=y(n);if(i)for(let e=i.length-1;e>=0;--e)t.push({node:i[e],shadow:null});if(r){let e=E?E(n):null;if(typeof e==`string`&&Y(e)===`template`){let e=n.content;xn(e)&&t.push({node:e,shadow:null})}}if(r){let e=pe(n);xn(e)&&t.push({node:null,shadow:e},{node:e,shadow:null})}}};return t.sanitize=function(e){let n=arguments.length>1&&arguments[1]!==void 0?arguments[1]:{},i=null,a=null,o=null,s=null;if(Ut=!e,Ut&&(e=``),typeof e!=`string`&&!Sn(e)&&(e=he(e),typeof e!=`string`))throw w(`dirty is not a string, aborting`);if(!t.isSupported)return e;Tt?(L=Et,R=Dt):nn(n),(I.uponSanitizeElement.length>0||I.uponSanitizeAttribute.length>0)&&(L=O(L)),I.uponSanitizeAttribute.length>0&&(R=O(R)),t.removed=[];let c=Ft&&typeof e!=`string`&&Sn(e);if(c){hn(e);let t=Ye(e);if(typeof t==`string`){let n=Y(t);if(!L[n]||yt[n])throw dn(e),w(`root node is forbidden and cannot be sanitized in-place`)}if(bn(e))throw dn(e),w(`root node is clobbered and cannot be sanitized in-place`);try{Fn(e)}catch(t){throw dn(e),t}}else if(Sn(e))i=gn(``),a=i.ownerDocument.importNode(e,!0),a.nodeType===A.element&&a.nodeName===`BODY`||a.nodeName===`HTML`?i=a:i.appendChild(a),Fn(i);else{if(!W&&!V&&!U&&e.indexOf(`<`)===-1)return N&&At?F(e):e;if(i=gn(e),!i)return W?null:At?P:``}i&&Ot&&X(i.firstChild);let l=c?e:i;try{let e=_n(l);for(;o=e.nextNode();)Dn(o,l),Nn(o,l),xn(o.content)&&Pn(o.content)}catch(n){throw c&&(dn(e),_(t.removed,e=>{e.element&&pn(e.element)})),n}if(c){let n=!1;if(_(t.removed,t=>{t.element&&(t.element===e&&(n=!0),pn(t.element))}),n)throw w(`a node selected for removal could not be safely returned; refusing to sanitize in place`);return V&&yn(e),e}if(W){if(V&&yn(i),kt)for(s=at.call(i.ownerDocument);i.firstChild;)s.appendChild(i.firstChild);else s=i;return(R.shadowroot||R.shadowrootmode)&&(s=st.call(r,s,!0)),s}let u=U?i.outerHTML:i.innerHTML;return U&&L[`!doctype`]&&i.ownerDocument&&i.ownerDocument.doctype&&i.ownerDocument.doctype.name&&C(Ie,i.ownerDocument.doctype.name)&&(u=` `+u),V&&(u=vn(u)),N&&At?F(u):u},t.setConfig=function(){let e=arguments.length>0&&arguments[0]!==void 0?arguments[0]:{};nn(e),Tt=!0,Et=L,Dt=R},t.clearConfig=function(){$t=null,Tt=!1,Et=null,Dt=null,N=Xe,P=``},t.isValidAttribute=function(e,t,n){$t||nn({});let r=Y(e),i=Y(t);return On(r,i,n)},t.addHook=function(e,t){typeof t==`function`&&x(I,e)&&ie(I[e],t)},t.removeHook=function(e,t){if(x(I,e)){if(t!==void 0){let n=ne(I[e],t);return n===-1?void 0:ae(I[e],n,1)[0]}return re(I[e])}},t.removeHooks=function(e){x(I,e)&&(I[e]=[])},t.removeAllHooks=function(){I=Ke()},t}return Je()}); //# sourceMappingURL=purify.min.js.map (function(g){'use strict'; function limit(s){if(s.length>200000)throw Error('Text limit: 200,000 characters.');return s.replace(/\r\n?/g,'\n');} function chat(s,o={}){s=limit(s);let removed=0;const pattern=/^(?:\[\d{1,4}[/.\-]\d{1,2}[/.\-]\d{1,4},?\s+\d{1,2}:\d{2}(?::\d{2})?(?:\s*[AaPp][Mm])?\]\s*|\d{1,4}[/.\-]\d{1,2}[/.\-]\d{1,4},?\s+\d{1,2}:\d{2}(?::\d{2})?(?:\s*[AaPp][Mm])?\s*[-–]\s*)([^:\n]{1,100}):\s?/; let text=s.split('\n').map(line=>{let m=line.replace(/^[\u200e\u200f]/,'').match(pattern);if(m){removed++;line=(o.sender?m[1]+': ':'')+line.replace(/^[\u200e\u200f]/,'').slice(m[0].length);}if(o.format)line=line.replace(/([*_~])([^\n]+?)\1/g,'$2');return line;}).join('\n');return {text,removed};} function csv(s,input,output,safe=false){s=limit(s).replace(/^\ufeff/,'');if(![',',';','\t','|'].includes(input)||![',',';','\t','|'].includes(output))throw Error('Choose a supported separator.');let p=g.Papa.parse(s,{delimiter:input,dynamicTyping:false,skipEmptyLines:false});if(p.errors.length)throw Error('CSV parse error: '+p.errors[0].message);if(p.data.length>10000)throw Error('CSV limit: 10,000 rows.');return {text:g.Papa.unparse(p.data,{delimiter:output,newline:'\r\n',escapeFormulae:safe}),rows:p.data.length};} function xml(s){s=limit(s);if(/10000||depth>100)throw Error('XML structure is too large/deep.');if(n.nodeType!==1)return ser.serializeToString(n);let kids=Array.from(n.childNodes);let mixed=preserve||n.getAttribute('xml:space')==='preserve'||kids.some(k=>(k.nodeType===3&&k.nodeValue.trim())||k.nodeType===4);if(mixed||!kids.some(k=>k.nodeType===1))return ser.serializeToString(n);let copy=n.cloneNode(false),shell=ser.serializeToString(copy),open=shell.replace(/\/>$/,'>'),close='';return open+'\n'+kids.filter(k=>k.nodeType!==3||k.nodeValue.trim()).map(k=>' '.repeat(depth+1)+walk(k,depth+1)).join('\n')+'\n'+' '.repeat(depth)+close;} let text=Array.from(doc.childNodes).map(n=>walk(n,0)).join('\n');if(/^\s*<\?xml/.test(s))text=(s.match(/^\s*(<\?xml[^?]*\?>)/)||[])[1]+'\n'+text;return {text};} function html(s,comments=false){s=limit(s);let text=g.DOMPurify.sanitize(s,{USE_PROFILES:{html:true},FORBID_TAGS:['style','iframe','object','embed','form','input','button','link','meta'],FORBID_ATTR:['style'],ALLOW_DATA_ATTR:false});let removed=g.DOMPurify.removed.length;const doc=new g.DOMParser().parseFromString(text,'text/html');if(comments){const w=doc.createTreeWalker(doc.body,128);let nodes=[];while(w.nextNode())nodes.push(w.currentNode);nodes.forEach(n=>n.remove());}const block=new Set(['DIV','P','UL','OL','LI','TABLE','THEAD','TBODY','TR','SECTION','ARTICLE','H1','H2','H3','H4','BLOCKQUOTE']);function fmt(n,d){if(n.nodeType!==1)return n.textContent;let kids=Array.from(n.childNodes);if(!block.has(n.tagName)||kids.some(k=>k.nodeType===3&&k.textContent.trim())||!kids.some(k=>k.nodeType===1))return n.outerHTML;let shell=n.cloneNode(false).outerHTML;let ix=shell.indexOf('>');return shell.slice(0,ix+1)+'\n'+kids.filter(k=>k.nodeType!==3||k.textContent.trim()).map(k=>' '.repeat(d+1)+fmt(k,d+1)).join('\n')+'\n'+' '.repeat(d)+shell.slice(ix+1);} // Formatted output is text only. Sanitize once more after serialization. text=Array.from(doc.body.childNodes).map(n=>fmt(n,0)).join('\n');text=g.DOMPurify.sanitize(text,{USE_PROFILES:{html:true},FORBID_TAGS:['style','iframe','object','embed','form','input','button','link','meta'],FORBID_ATTR:['style'],ALLOW_DATA_ATTR:false});return {text,removed};} async function decode(file){if(file.size>25*1024*1024)throw Error('Image limit: 25 MB.');if(!/\.(png|jpe?g|webp|gif|avif|bmp)$/i.test(file.name))throw Error('Supported files: JPG, PNG, WebP, GIF, AVIF, BMP.');let b=await g.createImageBitmap(file,{imageOrientation:'from-image'});if(b.width*b.height>40000000){b.close();throw Error('Image limit: 40 megapixels.');}return b;} async function check(file){let b=await decode(file);let out={name:file.name,size:file.size,width:b.width,height:b.height,status:'Decoded successfully — not a full integrity or malware check'};b.close();return out;} async function duplicates(files){if(files.length<2||files.length>50)throw Error('Choose 2–50 files.');if(files.reduce((n,f)=>n+f.size,0)>100*1024*1024)throw Error('Combined file limit: 100 MB.');const groups=new Map();for(const f of files){if(!/\.(png|jpe?g|webp|gif|avif|bmp)$/i.test(f.name))throw Error('Choose supported image file names.');if(f.size>25*1024*1024)throw Error('Each file must be at most 25 MB.');let bytes=await f.arrayBuffer(),hash=Array.from(new Uint8Array(await g.crypto.subtle.digest('SHA-256',bytes)),x=>x.toString(16).padStart(2,'0')).join('');let key=f.size+':'+hash;if(!groups.has(key))groups.set(key,[]);groups.get(key).push({name:f.name,size:f.size,hash});}return Array.from(groups.values()).filter(a=>a.length>1);} async function orient(file,angle,flip,mime){angle=Number(angle);if(![0,90,180,270].includes(angle)||!['none','horizontal','vertical'].includes(flip)||!['image/png','image/jpeg','image/webp'].includes(mime))throw Error('Invalid transform.');let b=await decode(file);const c=g.document.createElement('canvas'),swap=angle%180!==0;c.width=swap?b.height:b.width;c.height=swap?b.width:b.height;const ctx=c.getContext('2d');if(mime==='image/jpeg'){ctx.fillStyle='#fff';ctx.fillRect(0,0,c.width,c.height);}ctx.translate(c.width/2,c.height/2);ctx.rotate(angle*Math.PI/180);ctx.scale(flip==='horizontal'?-1:1,flip==='vertical'?-1:1);ctx.drawImage(b,-b.width/2,-b.height/2);b.close();const blob=await new Promise(r=>c.toBlob(r,mime,.92));if(!blob||blob.type!==mime)throw Error('Browser could not export this format.');return {blob,width:c.width,height:c.height};} g.VHBatch3={chat,csv,xml,html,check,duplicates,orient};})(typeof window==='undefined'?globalThis:window); (function(){'use strict';for(const root of document.querySelectorAll('[data-vh-b3]')){if(root.dataset.ready)continue;root.dataset.ready='1';const type=root.dataset.vhB3,hi=root.dataset.lang==='hi',t=(e,h)=>hi?h:e,K=window.VHBatch3;let text=['chat','csv','xml','html'].includes(type),fields='';const label=(title,content)=>'';if(text)fields+=label(t('Input text','टेक्स्ट पेस्ट करें'),'');else fields+=label(t(type==='duplicates'?'Choose 2–50 image files':'Choose image','चित्र चुनें'),'');if(type==='chat')fields+=label(t('Keep sender names','भेजने वाले का नाम रखें'),'')+label(t('Remove paired *, _ and ~ formatting','*, _ और ~ की जोड़ी हटाएं'),'');if(type==='csv'){let opts='';fields+=label(t('Input separator','मूल separator'),'')+label(t('Output separator','आउटपुट separator'),'')+label(t('Protect spreadsheet formula cells (changes values)','Spreadsheet formula वाले cells सुरक्षित करें (values बदलेंगी)'),'');}if(type==='orient')fields+=label(t('Clockwise rotation','घड़ी की दिशा में घुमाएं'),'')+label(t('Flip before rotation','घुमाने से पहले flip'),'')+label(t('Output format','आउटपुट फॉर्मेट'),'');root.innerHTML='
'+fields+'

';const form=root.querySelector('form'),status=root.querySelector('[role=status]'),result=root.querySelector('.result');let urls=[],output='';function clear(){urls.forEach(URL.revokeObjectURL);urls=[];result.replaceChildren();output='';status.textContent='';}form.addEventListener('input',clear);function dl(blob,name){let url=URL.createObjectURL(blob);urls.push(url);let a=document.createElement('a');a.href=url;a.download=name;a.className='download';a.textContent=t('Download output','आउटपुट डाउनलोड करें');result.append(a);return url;}function show(s){output=s;const box=document.createElement('textarea');box.readOnly=true;box.rows=10;box.value=s;box.setAttribute('aria-label',t('Output','आउटपुट'));result.append(box);let b=document.createElement('button');b.type='button';b.textContent=t('Copy output','आउटपुट कॉपी करें');b.onclick=async()=>{try{await navigator.clipboard.writeText(output);status.textContent=t('Copied.','कॉपी हुआ।');}catch(e){status.textContent=t('Select the output and copy manually.','आउटपुट चुनकर कॉपी करें।');}};result.append(b);} form.addEventListener('submit',async e=>{e.preventDefault();clear();form.querySelector('button').disabled=true;status.textContent=t('Processing…','तैयार हो रहा है…');try{let o,ext='txt',mime='text/plain;charset=utf-8';if(type==='chat'){o=K.chat(form.elements.text.value,{sender:form.elements.sender.checked,format:form.elements.format.checked});status.textContent=t('Recognized message headers: ','पहचाने गए message headers: ')+o.removed;}if(type==='csv'){o=K.csv(form.elements.text.value,form.elements.input.value==='tab'?'\t':form.elements.input.value,form.elements.output.value==='tab'?'\t':form.elements.output.value,form.elements.safe.checked);ext=form.elements.output.value==='tab'?'tsv':'csv';mime='text/csv;charset=utf-8';status.textContent=t('Rows: ','Rows: ')+o.rows;}if(type==='xml'){o=K.xml(form.elements.text.value);ext='xml';status.textContent=t('Valid XML.','XML सही है।');}if(type==='html'){o=K.html(form.elements.text.value,true);ext='html';status.textContent=t('Cleaned HTML. Removed items: ','HTML साफ हुआ। हटाए items: ')+o.removed;}if(o){show(o.text);dl(new Blob([o.text],{type:mime}),'vh-'+type+'.'+ext);}else{let files=Array.from(form.elements.file.files);if(type==='check'){o=await K.check(files[0]);show(JSON.stringify(o,null,2));status.textContent=t('Browser decoded this image.','Browser ने चित्र खोल लिया।');dl(new Blob([output],{type:mime}),'image-check.txt');}if(type==='duplicates'){let groups=await K.duplicates(files);show(groups.length?JSON.stringify(groups,null,2):t('No exact file duplicates found.','बिल्कुल समान फाइलें नहीं मिलीं।'));status.textContent=t('Duplicate groups: ','समान फाइलों के समूह: ')+groups.length;dl(new Blob([output],{type:mime}),'duplicate-images.txt');}if(type==='orient'){o=await K.orient(files[0],form.elements.angle.value,form.elements.flip.value,form.elements.mime.value);const url=dl(o.blob,'oriented.'+(o.blob.type==='image/jpeg'?'jpg':o.blob.type.split('/')[1]));const img=document.createElement('img');img.src=url;img.alt=t('Transformed output preview','घुमाए चित्र का preview');img.style.maxWidth='100%';result.prepend(img);status.textContent=o.width+' × '+o.height+' px; '+o.blob.type;}}}catch(e){status.textContent=t('Error: ','त्रुटि: ')+e.message;}finally{form.querySelector('button').disabled=false;}});}})();